One mom came to me (WDL), with this same questions. Since everyone else had completed the requirement, I asked her if her son shovels snow. She said yes that he shovels the snow at their apartment complex before school; without pay. I said that that amounted to cleaning up our outdoors, and that I would accept it.
Yes, it has now started to melt the snow, but felt that I couldn't count on it. Either way, I'll be sure to advertise our Pack's spring cleanup day this year!